Adjusted Peak Performance
- Adjusted Peak Performance
Adjusted Peak Performance (APP) is a metric introduced by the U.S. Department of Commerce's Bureau of Industry and Security (BIS) to more accurately predict the suitability of a computing system to complex computational problems, specifically those used in simulating nuclear weapons. This is used to determine the export limitations placed on certain computer systems under the Export Administration Regulations 15 CFR.
The metric was introduced in April 2006 to replace the Composite Theoretical Performance (CTP) metric which was introduced in 1993. APP was itself replaced in November 2007 when the BIS amended 15 CFR to include the December 2006 Wassenaar Arrangement Plenary Agreement Implementation's new metric - Gigaflops (GFLOPS).
The (simplified) algorithm used to calculate APP consists of the following steps:
* Determine how many 64 bit (or better) floating point operations every processor in the system can perform per clock cycle (best case). This is FPO(i).
* Determine the clock frequency of every processor. This is F(i).
* Choose the weighting factor for each processor: 0.9 for vector processors and 0.3 for non-vector processors. This is W(i).
* Calculate the APP for the system as follows: APP = FPO(1) * F(1) * W(1) + ... + FPO(n) * F(n) * W(n).
The unit of measurement is Weighted TeraFLOPS (WT).
Notes:
* Processors without 64 bit (or better) floating point support have an FPO of zero.
* The current APP limit is 0.75 WT.
* Use the document referenced below (or an updated version) if you need to calculate APP for export purposes. It holds more details and a number of clarifications and exceptions. Also consult a lawyer who specializes in these things.
External links
* [http://www.gpo.gov/bis/ear/txt/ccl4.txt DUAL-USE LIST - CATEGORY 4 - COMPUTERS]
* [http://www.intel.com/support/processors/sb/CS-017346.htm Intel's microprocessor export compliance metrics]
*
Wikimedia Foundation.
2010.
Look at other dictionaries:
High-performance liquid chromatography — An HPLC. From left to right: A pumping device generating a gradient of two different solvents, a steel enforced column and an apparatus for measuring the absorbance. Acronym HPLC Classification Chromatography … Wikipedia
FLOPS — Computer performance Name FLOPS yottaFLOPS 1024 zettaFLOPS 1021 exaFLOPS 1018 petaFLOPS 1015 teraFLOPS 1012 gigaFLOPS 109 megaFLOPS 106 kiloFLOPS … Wikipedia
Weighted TeraFLOPS — (WT) is a unit of measurement introduced by the U.S. Department of Commerce s Bureau of Industry and Security to specify Adjusted Peak Performance (APP). The weighting factor is 0.3 for non vector processors and 0.9 for vector processors. For… … Wikipedia
APP — is short for application.It could be an abbreviation for: * Appalachian State University * Appalachian MountainsAPP could mean:*Adjusted Peak Performance, a metric to measure computing performance in 64 bit processors and above *Advanced… … Wikipedia
Agriculture and Food Supplies — ▪ 2007 Introduction Bird flu reached Europe and Africa, and concerns over BSE continued to disrupt trade in beef. An international vault for seeds was under construction on an Arctic island. Stocks of important food fish species were reported… … Universalium
Human nutrition — For aspects of nutrition science not specific to humans, see Nutrition. Human nutrition is the provision to humans to obtain the materials necessary to support life. In general, humans can survive for two to eight weeks without food, depending on … Wikipedia
Nutrition — The Nutrition Facts table indicates the amounts of nutrients which experts recommend to limit or consume in adequate amounts. Nutrition (also called nourishment or aliment) is the provision, to cells and organisms, of the materials necessary (in… … Wikipedia
Neutrodyne — The Neutrodyne was a particular type of Tuned Radio Frequency (TRF) radio receiver, in which the instability causing inter electrode capacitance of the triode RF tubes is cancelled out or neutralized . In most designs, a small extra winding on… … Wikipedia
John Merrill — John Merrill, from Derbyshire, England, is a marathon walker, [cite web |url=http://news.bbc.co.uk/1/low/england/2691355.stm |title=Soap s Ken Barlow graduates |accessdate=2008 03 13 |work=BBC ] a profession which he can be said to have… … Wikipedia
Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… … Universalium
